关键码：
<!--
     var n,x,y,z;
     function move(n,x,y,z)
     {
        if(n==1)
        {
        document.write(x+ "-->" + z + "<br>");
        }
        else
        {
        move(n-1,x,z,y);
        document.write(x+ "-->" + z + "<br>");
        move(n-1,y,x,z);
        }
      }
     function main()
     {
     var h;
     h=parseInt(prompt("\ninput number:"));
     document.write("the step to moving " + h + " diskes:<br>");
     move(h,"A","B","C");
     }
    main();
//-->
写 4个 disk的程序运行过程分析，关键是move函数，如第一步move(4,'A','B','C')；move(3,'A','C','B')；move(2,'A','B','C')；move(1,'A','C','B')；输出A-->B，后面就不知道了,请各位帮忙了，小弟新手，谢了哦！